/*
 * Copyright 2009 NCHOVY
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.krakenapps.console;

import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.CumulativeProtocolDecoder;
import org.apache.mina.filter.codec.ProtocolDecoderOutput;

public class TelnetDecoder extends CumulativeProtocolDecoder {
	@Override
	protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {
		ShellSession shell = (ShellSession) session.getAttribute("session");
		session.setAttributeIfAbsent("FSM", new TelnetStateMachine(out, shell.getScriptContext()));

		TelnetStateMachine state = (TelnetStateMachine) session.getAttribute("FSM");

		while (in.hasRemaining()) {
			byte b = in.get();
			state.feed(b);
		}

		return false;
	}
}